Healthy Clinical Trial
Official title:
Targeting Top-down and Bottom-up Processing in Eating Disorders Using Computerized Training Approaches: A Multimodal Outcome Study
This research project aims to explore the effectiveness of combined go/no-go training and
implementation intentions in targeting binge eating frequency among people with binge eating
disorder and bulimia nervosa.
The full intervention is 4 weeks long and consists of completing the training and food
diaries every day and meeting with the researcher twice for EEG recording. Moreover, it
involves completing questionnaires at baseline, at intervention completion, and one month
after the intervention.
Moreover, healthy control participants will be recruitment to complete baseline
questionnaires and take part in one EEG recording session in order to assess baseline
differences in brain activation in response to computer tasks.
Participants will learn about the study through flyers, e-mail, and social media (i.e.
twitter and Facebook) which will describe the interventional nature of the study, the main
eligibility criteria, and the researcher's contact information. Interested individuals will
be asked to contact the researchers, who will then send an information sheet detailing the
study procedure and what participation would involve. After reading the information sheet,
interested individuals will be contacted by the researchers in order to confirm all
eligibility criteria including diagnostic assessment. If these are met a PDF of the consent
form will be sent to the participants, including information about their rights as
participants and their ability to withdraw at any time without having to give a reason.
Participants who sign the consent form will respond to the email with the attached document.
Next, researchers will contact the participant to set an appointment to enter the lab for the
first EEG recording. Before entering the lab, participants will be asked to complete a food
diary and complete the complete a battery of questionnaires. The questionnaires include: 1) a
demographic questionnaire, 2) eating disorders examination questionnaire, 3) food ratings
test, 4) self-regulation of eating behaviour questionnaire for adults, 5) The negative
urgency scale, 6) the adults eating behaviour questionnaire, 7) GAD-7, and 8) PHQ-9.
Upon participants' arrival to the lab, participants will be asked to complete the food rating
task. Next, they will learn to complete the training tasks (i.e. food specific go/no-go and
general go/no-go) and perform them during EEG recording. They will be offered the opportunity
to ask questions relating to the task or the EEG at any time. Their weight will also be
measured.
Participants will be asked to complete the training and complete food diaries every day for
four weeks. The successful/ unsuccessful attempts at implementation intentions will be
assessed weekly by a mentor. A researcher/clinician will discuss setting the implementation
intention goals with the participant over email. At the end of the training, participants
will enter the lab to re-complete the four tasks while researchers record brain activation
using the EEG. They will also be asked to complete the food rating task again and their
weight will be re-assessed. Before leaving, they will be asked to complete a feedback sheet
in which they can express their experience with the training, in terms of facilitators and
barriers and visual analogue scales that will ask participants to rate the acceptability,
usefulness and level of burden experienced with training.
Participants will then be followed up at 1 month post-intervention; they will be asked to
complete the battery of questionnaires used at baseline and post-intervention.
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